Data/hora: 19/06/2024 04:12:01

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 12/03/2020
Data da última atualização: | 12/03/2020
Autoria: | CANDIDO, W. dos S.; SILVA, C, M. e; COSTA, M. L.; SILVA, B. E. de A.; MIRANDA, B. L. de; PINTO, J. F. N.; REIS, E. F. dos.
Afiliação: | Willame dos Santos Candido, Universidade Federal de Jataí; Caique Machado e Silva, Universidade Federal de Jataí; Maraiza Lima Costa, Universidade Federal de Jataí; Bruna Elaine de Almeida Silva, Universidade Federal de Jataí; Beatriz Lima de Miranda, Universidade Federal de Jataí; Jefferson Fernando Naves Pinto, Universidade Federal de Jataí; Edésio Fialho dos Reis, Universidade Federal de Jataí.
Título: | Selection indexes in the simultaneous increment of yield components in topcross hybrids of green maize.
Ano de publicação: | 2020
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, v. 55, e01206, 2020.
Idioma: | Inglês
Notas: | Título em português: Índices de seleção no incremento simultâneo de componentes de produção dos híbridos topcross de milho verde.
Conteúdo: | The objective of this work was to define the most suitable selective strategy for the simultaneous increment of yield components of green maize, by comparing three selection indexes weighted by economic weights and by the REML/BLUP method, in the assessment of predicted genetic gains for traits of interest. An experiment with 75 topcross hybrids from partially inbred S1 lines of green maize was carried out in Jataí, in the state of Goiás, Brazil, using a randomized complete block design, with four replicates. The following yield traits were evaluated: straw ears and commercial ears, grain mass, ear length, ear diameter, and number of ear rows. The selection indexes of Smith and Hazel, Williams, and Mulamba & Mock were applied and weighted for four economic weights (1, CVg, CVg/CVe, and h²). Among the tested selection indexes, those of Williams and Mulamba & Mock are the best-fit ones for the selection of topcross hybrids of green maize, as they provide positive and more balanced selection gains for all evaluated traits. The REML/BLUP method shows better predicted genetic gains than those achieved by the three selection indexes, besides being efficient for the selection of topcross hybrids of green maize.
Palavras-Chave: | Economic weights; Mixed models; Modelo misto; Peso econômico; REML/BLUP.
Thesagro: | Zea Mays.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/211769/1/Selection-indexes-in-the-simultaneous.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (64519-1) - UPE - AP - DD -  -  -  - DIS